Thirty million Americans are getting some bad health news: they have high blood pressure and need to do something about it, according to new, more aggressive hypertension treatment guidelines released by heart doctors Monday.

The doctors and other experts, from the American Heart Association, the American College of Cardiology and nine other groups, are moving the goal line for blood pressure control, meaning 46% of U.S. adults — about 103 million — could now be diagnosed with hypertension.